hash algorithm: blake2b-256
body: CIP-0169 Example: Parameter Change (Preview)
  abstract: Update maxBlockBodySize parameter from 90112 to 98304 bytes on the Preview testnet.
  motivation: Demonstrates CIP-0169 binding of a protocol parameter update, including the previous governance action id.
  rationale: The bound protocol_param_update and gov_action_id make replay against a different parameter change machine-detectable.
  on chain:
    deposit: 1000000000
    gov action:
      tag: parameter_change_action
      protocol param update:
        max block body size: 98304
      gov action id:
        gov action index: 0
authors:
  name: Ryan Williams
  witness:
    witness algorithm: ed25519